I'm using ParaView 3.8.1 64bit for my studies and read some ASCII tecplot files with several timesteps and scalar value Z.

First of all I use the filter "TemporalStatistics" and generate a standard deviation of Z. Then I want to use Z and Z_stddev within the calculator. There's only the possibilitie to choose both values on the dropdown menu "Scalars" when I made a GroupDataset of my tecplot-file and the TemporalStatistics before. But when I apply to the calculator, unfortunately I receive an error "expeting a variable name" every time.

Isn't it possible to use the calculator after GroupDatasets, using variables that have been calculated withing the datasets?